Net Earnings (Loss) Per Share

6 Months Ended

Jun. 30, 2021

(8) Net Earnings (Loss) Per Share

The calculations of net earnings (loss) per share - basic and net earnings (loss) per share - diluted were as follows:


	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2021		2020			2021		2020
Net earnings (loss) available to common shareholders	$	111.6	$	(64.4	)	$	173.6	$	(62.7	)
Weighted-average common shares outstanding (in millions)
Weighted-average common shares outstanding - basic		54.5		58.2			54.8		58.5
Effect of dilutive securities - stock options		0.2		—			0.1		—
Effect of other share-based awards		0.7		—			0.6		—
Weighted-average common shares outstanding - diluted		55.4		58.2			55.5		58.5
Net earnings (loss) per share - basic	$	2.05	$	(1.11	)	$	3.17	$	(1.07	)
Net earnings (loss) per share - diluted	$	2.02	$	(1.11	)	$	3.13	$	(1.07	)

There were 0.1 million and 1.1 million share-based awards excluded from the calculation of net earnings (loss) per share - diluted for the three months ended June 30, 2021 and 2020, respectively, because their impact was anti-dilutive. There were 0.2 million and 0.9 million share-based awards excluded from the calculation of net earnings (loss) per share - diluted for the six months ended June 30, 2021 and 2020, respectively, because their impact was anti-dilutive. Due to the net loss for the three months and six months ended June 30, 2020, the assumed exercise of share-based awards had an anti-dilutive effect and therefore were not included in the calculations of net loss per share - diluted for the three months and six months ended June 30, 2020.